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C++字符串 | Stringsstd::basic_string_view::substr

性病:基本[医]弦[医]意见:

constexpr basic_string_view substr(size_type pos = 0, size_type count = npos ) const;

(since C++17)

返回子字符串的视图。[pos, pos + rcount),在哪里rcount是较小的countsize() - pos...

参数

pos

-

position of the first character

count

-

requested length

返回值

子字符串的视图[pos, pos + rcount)...

例外

std::out_of_range如果pos > size()...

复杂性

常量。

另见

copy

copies characters (public member function)

find

find characters in the view (public member function)

代码语言:txt
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